{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["location", "organization", "person", "else"], "input": "The 30-year-old Edberg , a former two-time Open champion , had wrestled control of the match away from Karbacher when the German , hampered by a left hamstring injury , decided he could n't continue under the stadium lights at the National Tennis Centre ."}
{"location": ["National Tennis Centre"], "organization": [], "person": ["Edberg", "Karbacher"], "else": ["Open", "German"]}